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<head><meta charset="utf-8"><title>Backport #73485 Perform obligation deduplication to avoid bu · t-compiler/wg-prioritization · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/index.html">t-compiler/wg-prioritization</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/Backport.20.2373485.20Perform.20obligation.20deduplication.20to.20avoid.20bu.html">Backport #73485 Perform obligation deduplication to avoid bu</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/Backport%20%2373485%20Perform%20obligation%20deduplication%20to%20avoid%20bu/near/201423575" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/Backport.20.2373485.20Perform.20obligation.20deduplication.20to.20avoid.20bu.html#201423575">(Jun 19 2020 at 18:08)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="2403">@WG-prioritization</span> PR <a href="https://github.com/rust-lang/rust/issues/73485">#73485</a> has been requested for beta backport.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/Backport%20%2373485%20Perform%20obligation%20deduplication%20to%20avoid%20bu/near/201423576" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/Backport.20.2373485.20Perform.20obligation.20deduplication.20to.20avoid.20bu.html#201423576">(Jun 19 2020 at 18:08)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="2403">@WG-prioritization</span> PR <a href="https://github.com/rust-lang/rust/issues/73485">#73485</a> has been requested for stable backport.</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/227806-t-compiler/wg-prioritization/topic/Backport%20%2373485%20Perform%20obligation%20deduplication%20to%20avoid%20bu/near/201424185" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Léo Lanteri Thauvin <a href="https://rust-lang.github.io/zulip_archive/stream/227806-t-compiler/wg-prioritization/topic/Backport.20.2373485.20Perform.20obligation.20deduplication.20to.20avoid.20bu.html#201424185">(Jun 19 2020 at 18:15)</a>:</h4>
<ul>
<li>Fixes a <code>P-high</code> stable regression from 1.33.0, <a href="https://github.com/rust-lang/rust/issues/59326">#59326</a>, rejecting previously valid code. See <a href="https://github.com/rust-lang/rust/issues/59326#issuecomment-645911137">MCVE</a>.</li>
<li>Changes from this PR are very minimal, with 13 additions and 3 deletions.</li>
<li><a href="https://perf.rust-lang.org/compare.html?start=e55d3f9c5213fe1a25366450127bdff67ad1eca2&amp;end=c9f613bb7aaebcb256e34b959196f56f62ca74c8">Tested to incur no performance regression.</a></li>
<li>Not merged yet into master.</li>
</ul>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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